Which property does not describe a compound

A
It is a pure substance
B
It is mixed any proportions by mass
C
It cannot be separated into constituents by physical means
D
It’s composed of two are more elements

Solution:

Chemical compounds are pure substances and they are formed by certain fixed composition of two or more elements. Chemical components can be separated into individuals through chemical reactions only but not from physical means. Hence, statement B is incorrect regarding compound.

Solution:

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